Pipe bending machine



Aug.13, 1946. E.LAMPQE, SR 1 05,75

PIPE BENDING MACHINE I I Filed Aug. 17, 1943 8 Sheets-Sheet 1 INVENTOR] 6/01/7155 E. A MP4 6/;

ATTORNEYG Aug, 13, 1946 c. E. LAMPE, SR 2,405,759

PIPE BENDING MACHINE Filed Aug, 17,-1945 s Sheets-Sheet 4 Q INVENTOR. m U (HA/H585. LAM/=5, s4 xx I I I 0 g a a, a an:

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PIPE BENDING MACHINE Filed Aug. 17, 1943 8 Sheets-Sheet 6 INVENTOR. cx/Aflmsi. (AA/PA: 67?.

ATTORNEYS IN VEN TOR. 0404/91 is AAA/Pi; $4;

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a Sheets-Sheet 7 Filed Aug. 17, 1943 C E LAMPE, SR

PIPE BENDING MACHINE ZAGSJSQ c. E. LAMPE, SR

PIPE BENDING MACHINE Filed Aug. 17,1943

Aug, i3, 194% 8 Sheets-Sheet 8 Patented Aug. 13, 1946 UNITED STATES PATENT QFFlCE PIPE BENDING MACHINE Charles E. Lampe, Sn, Philadelphia, Pa, assignor, by direct and mesne assignments, of fourtenths to Charles Lovejoy, and one-tenth to Henry M. Kannee, Washington, D. 0.

Application August 17, 1943, Serial No. 498,949

7 Claims.

My invention relates to new and useful imrovements in hollow pipe bending machines, the primary object of the invention being to provide a machine of this character which is capable of bending pipe of varied diameters made of any kind of metal or alloy in a reasonable short period of time.

A further object of the invention resides in the provision of means for bending hollow pipe to desired angles so that the resultant bends are smooth, round in cross section, devoid of crimps or wrinkles and without appreciable reduction in the thickness of metal.

A further object of the invention resides in pro viding a machine of the character mentioned in which the pipe is caused to be bent around a rotating forming wheel in cooperation with a moving or slidable form with a rotating spinner mandrel utilized within the pipe, said forming wheel and spinner mandrel also acting as means tending to release the pipe When the bending operation is completed.

A further object of the invention resides in providing an improved forming means in a pipe bending machine.

Another object of the invention resides in providing an improved clamping means for retaining the end of the pipe to the forming wheel.

Still another object of the invention resides in the provision of an improved vise coacting with the sliding form or shoe for retaining the pipe in proper relation at all times to the forming wheel.

Still another object of the invention resides in roviding means for readily adjusting and setting the motor and shaft for the spinner mandrel to accommodate forming Wheels and pipes of varied radii and diameters, respectively.

With these and numerous objects in view, my invention consists in the novel features of construction, combination and arrangement of parts as will be hereinafter refered to and more particularly pointed out in the specification and claims.

In the accompanying drawings, forming a part of this application,

Figure 1 is a top plan view of a pipe bending machine constructed in accordance with my invention,

Figure 2 is a side elevation thereof.

Figure 3 is a fragmentary side elevation, with parts broken away and parts in section, illustrating particularly the driving mechanism connected with the forming wheel,

Figure 4 is a top plan view, showing a hollow 2 pipe completely bent on a forming wheel of greater radius than that shown in Figure 1, with the motor and drive shaft for the spinner mandrel positioned accordingly,

Figure 5 is an enlarged fragmentary plan view of the forming wheel showing a pipe clamped in position and about to be bent on said wheel,

Figure 6 is a fragmentary top plan view showing the forming wheel, the sliding form or shoe and the vise structure cooperating with the latter,

Figure 7 is a detailed vertical section in fragment, showing particularly the structure of the pipe clampingmeans and its relation to the forming wheel,

Figure 8 is a similar view with elements of the clamp separated,

Figure 9 is an end elevation of the machine, with parts broken away and parts in section, showing particularly the relationship of the vise to the sliding form and the pipe clamping means to the forming wheel,

Figure 10 is a vertical transverse section through the machine showing the detailed structure of the Vise and the relation between the same and the sliding form,

' Figure 11 is a vertical transverse section. as shown on the line llll of Figure 10, looking in the direction ofthe arrows,

Figure 12 is a similar view as seen on the line l2--I 2 of Figure 10, looking in the direction of the arrows,

Figure 13 is a similar view as seen along the line lit-l3 of Figure 10, looking in the direction of the arrows,

Figure 14 is a front elevation of the locking key plate used in the vise,

Figure 15 is a vertical section therethrough as seen on the line l5l 5 of Figure 14,

Figure 16 is a fragmentary perspective view, partly in section, of the sliding form or shoe showing the rack bar thereon, and

Figure 17 is a detailed vertical section showing the forming wheel removed from its driving shaft and about to be applied thereto.

In the bending of hollow pipe, particularly pipe of large diameter, formed of certain hard metals, considerable difliculty has been encountered commercially. A great length of time has been required to bend such pipe and in many instances pipe formed of certain metals has been found impossible to bend. Moreover, when and if it were possible to bend certain pipes, distortion occurred at the bend thereof or crimping was notable. Attempts to correct the distortion or remove the crimping have caused reduction in the thickness of metal at the bends. It is the purpose of my invention, as aforementioned, to overcome these many difl'iculties and provide a means for bending pipe in a reasonably short period of time.

In describing my invention, I shall refer to the drawings, in which similar reference characters designate corresponding parts throughout the several views, and in which the numeral l designates a housing or casing for my machine, the bed of which is designated by the numeral 2. Mounted within the housing or casing one. base 3 is an air motor 4 which connects with a speed reducer 5. A bevel gear Sconnected with the speed reducer meshes with a larger bevel gear I mounted on the vertical shaft 8, the latter being mounted in bearings located at points in the bottom of the bed and on the base of the machine respectively. Keyed to the lower portion of shaft 8 is a spur gear 9 which in turn meshes with a larger spur gear Ill carried at the lower end of a second vertical or driven shaft H, as particularly illustrated in Figures 2 and 3 of the drawings. This shaft H projects upwardly through the top of the machine and is adapted to operate the forming wheel, as will be hereinafter and more particularly set forth.

The upper portion of the shaft H is keyed to a sleeve I2, the upper endof-which is provided with an outstanding annular flange l3. Surrounding the sleeve lZ is a stationary collar or the like l4 and interposed between said collar I 4 and the sleeve I 2 is a wear sleeve or the like IS, the upper end of which is also provided with an outstanding annular flange l6 resting on the upper peripheral edge of the collar l4 so that the flange [3 also contacts therewith. A narrow collar I! surrounds the shaft below the elements I2, l4 and 55 to hold the latter in proper position on the shaft; said collar being secured in position by means of a transverse pin l8 projecting therethrough and through said shaft I l, as particularly illustrated in Figure 9 of the drawings.

Upon the upper end of this shaft H, as aforesaid, the forming wheel is adapted to'be-supported. wheel is the wheel about which the pipe is bent and wheels of various radii may be used but in each instance the forming wheelwill be of the same construction.

In order to support a forming wheel on the shaft H, I provide a supporting collar or the like lla which is fitted over; the upper end of the shaft and provided with a lower annular flange l8a the latter being bolted, as shown at i9, to the flange [3 of the sleeve: 12, asclearly shown in Figuresi), 10, and 17. The upper end of the collar Ha has an annular flange 20 formed thereon into whichis threadeda plurality of upstanding studs 2!. These studs form a means for engaging the forming wheel, as will be hereinafter and more particularly set forth.

The forming wheel is designated by the numeral 22, the periphery thereof being concave as shown at 23. This wheel 22 has a central hub portion 24 of a diameter toreceive the upper end of the shaft I l and a thick disc-like central portion or web 25 connecting the hub portion 24 with the periphery of the wheel. Thus, the forming wheel is in some respects similar to a pulley wheel and the disc-like central web portion 25 is provided witha plurality of openings 26 which are adapted to receive therein the studs 2| when the wheel is applied to the upper end of the shaft H as shown in Figures and 17 of the drawings. When the forming wheel is applied to the As previously indicated, the forming 20 of the collar II to fit therein when the wheel is applied to the shaft, as best shown in Figures 19 and l? of the drawings. In order to further secure the forming wheel to the shaft H a plate 28 is applied to the outer end of the hub 24 and a bolt 29 is projected therethrough and threaded into the outer end of the shaft l I, as clearly shown in Figure 10.

The forming wheel 22 has a notch, recess or cut-out portion 30 formed therein to provide for the clamping means to secure the end of the pipe thereto, as will be hereinafter and more particularly set forth. There is secured to the upper face of the wheel 22 at its periphery a gear segment 33, the same being bolted in place on the wheel as shown at 32. The teeth of this segment 3| mesh with the teeth of a rack bar 33 secured to a sliding form 3 the inner face of which is concaved and conformed to the concavity 23 in the periphery of the forming wheel. This sliding form constitutes a guide for the pipe which is being bent or the forming wheel 22. The sliding form 34 is removably supported on a block or head 35 which is adiustably supported in a manner hereinafter and more particularly set forth.

The block 35 is, in fact, the head of a vise-like member, utilized to force the sliding form 34 toward the forming wheel so as to look a pipe to be bent in tight engagement between said Wheel and sliding form. The outer face of the block or head 35 is channel shaped so as to receive and support therein the moving form 34. A wear plate of L-shaped design designated in the drawing by the numeral 36 is fitted in the block 35 against the inner and lower walls thereof, as clearly shown in Figure 10 of the drawings. The upper portion of the block 35 is arcuately formed and over-hangs the sliding form 34 so as to provide a substantial support for the latter as it moves with the forming wheel through the medium of the intermeshing teeth 3| and 83. Thus, the pipe, which I have designated in the drawings by the numeral 31, and whichis adapted to be bent on the forming wheel 22, is supported in position against the concave portion 23 of said wheel by means of the moving form 34, as clearly shown in Figures 3 and 4 of the drawings. This pipe 37 is adapted to be drawn forwardly around the forming wheel 22 and as said pipe is guided and supported by the moving form 34 any tendency toward forcing of the pipe away from the forming wheel will be counteracted by the action of the moving form 34.

This moving form 3 is further supported by a transverse roller 38 mounted in bearings 39 on the bed of the machine, as clearly shown in Figures l, 3 and 4 of the drawings.

As stated heretofore, the block or head 35 is a portion of a vise-like device for adjustment of said head or block to its effective position. Since thi 'block is movable transversely of the bed of the machine, I have provided a proper support and operating means therefor. A supporting plate 40 project laterally from the bed of the machine which has bolted thereto, as shown at 4|, the base plate 42. The upper face of said plate 42 is provided with a pair of longitudinally spaced apart grooves 43, the wallsof which are beveled outwardly from their upper to their lower 5 edges. Bolted, as shown at M, to the lower face of the block 35 are the spaced longitudinal ribs 45, the side edges of which are also beveled outwardly from their upper to their lower edges,

coincident to the beveling of the walls of the block 35 is provided with a housing QB in whichthere is a slot 50 receiving the head 5! of adjusting screw 52;. This adjusting screw is extended through a threaded opening 53 in the vise plate 46.

Supported on the plate 45 at its outer end and abutting the outer end of the base plate 42 is the end plate 54 secured in position to the end of the plate 42 by means of the bolts 55. This end plate 54 through the medium of a central opening therein support the unthreaded end of a screw shaft 56, as clearly shown in Figures 6, l and 13 of the drawings. The outer end of said shaft 56 is provided with a handle 51 and the inner end. thereof extends through a threadedopening 58 in the compound vise plate 45. Thus, it will be seen that the vise plate at and the block or head 35 may be moved or adjusted longitudinally on the plate 42 by adjustment of the screw shaft 55*. This would be a coarse adjustment and a final adjustment of the block or head 35 is made through the medium of the adjusting screw 52.

The formation of the longitudinal grooves 43 in plate 42 provide a substantially V-shaped central rib 59 and side ribs 59 on said plate. These side ribs 59 are cut away at intervals to provide a plu rality of transversely registering notche 59a. A locking key plate 50 is provided which is adapted to be positioned in the transverse notches 59a so that one face of said key plate abuts the rear face of the compound vise block 45. This will retain the vise block in its initial or coarse adjustment heretofore referred to. i

The locking key plate Bil is T-shaped in cross section, as shown in Figures 14 and 15 of the drawings, to rest on the base plate t2 and fit in the notches 59a. The central portion of the key plate is arcuately cut out as shown at so as to permit the screw shaft 55 to extend therethrough. In other words, the key plate ES straddles the screw shaft 56, as best shown in Figure of the drawings. Through this medium of coarse and fine adjustment of the block or head 35, it is apparent that the moving form 34 may be readily and securely adjusted to the proper position to support the pipe to be bent on the forming wheel.

As aforesaid, the pipe is adapted to be bent around the forming wheel 22 and I have provided a special locking means for securing the end of the pipe to said wheel. The periphery of the wheel 22, as previously mentioned, has a notch, recess or cut-out portion therein as shown at 35 and by cutting away this portion of the wheel a thin fiat face 62 is provided to which is welded or otherwise similarly secured a block 63. The outer face of this block is concaved as shown at 54 and the upper and lower edges of the block at the outer face thereof are provided with the projections or flange 65.

An L-shaped clamping member 56 is provided, to the upper edge of which is hingedly engaged (ill I 6 the movable jaw 61. The lower arm of the L- shaped clamp 66 and the hinged jaw 61 are each provided with a groove 68, which grooves are adapted to be engaged with the flanges 65 of the block 63 and an insert block 69 is provided for retention within the clamp 65 for abutment against the outer face of the block 63. The insert block 59 has its face which is opposed to the block 63 concaved as shown at 1D to conform to the concavity 64 of the block 63, whereby a pipe may be secured therebetween. An adjusting screw H projecting through the vertical arm of the clamp 66 permit the insert block 69 to be secured against the pipe after the clamp has been properly engaged with the block 53. In Figure 8 of the drawings, I have shown the elements of this clamping means separated and in Figure '1 I have shown the elements secured in position to retain the end of a pipe securely to the forming wheel. In Figure 4 I have shown the pipe 3'! properly secured to the forming wheel through the clamping means and'the bend completed.

As a guide to the operator of the machine to illustrate the bend to be formed, a curved wire 52 may be provided and secured by a screw 13 in an upstanding projection M on the hinged portion 61 of the clamp, as clearly shown in Figures 4 and '7 of the drawings. This wire is in full view of the operator of the machine and since it is of predetermined length, according to the extent of curve to be applied to the pipe, it will extend about the wheel for a predetermined portion of its circumference when applied and secured by the screw '53. When the free end of the wire reaches the outer end of the mounting member or track 35, the operator will know that the pipe has been bent as much as desired and cut off the motor.

A feature of my invention, as previously set forth, is the provision of means for rather quickly bending pipe and eliminating crimping or the like at the bend thereof. Naturally, an internal means is provided to produce this result. This internal means is a constantly rotating one and it is specifically a spinner mandrel designated in the drawings by dotted lines and the numeral 15. The detailed structure of this spinner mandrel is disclosed and described in my co-pending application, Serial No. 465,626, filed November 14, 1942, Patent No. 2,357,011, dated August 29, 1944. The mandrel consists generally of a spinner body with a plurality of rollers mounted therein and a loose linked spinner head with a plurality of additional rollers mounted therein. As the specific construction of this spinner mandrel is clearly shown in the aforesaid copending application, I do not deem it necessary to illustrate the same in detail nor to further describe the construction thereof.

The spinner mandrel is carried at the end of a drive shaft it which projects from the electric motor Tl supported on the frame 18. This frame operates in guides '59 extending transversely of the bed of the machine at one end of the latter, as clearly shown in Figures 1 and 4 of the drawings. Movement of the'frame l8 laterally on the machine is accomplished by operation of the handle 8i carried on a screw shaft 8! which extends laterally of the machine and operates through a threaded collar or the like 82 on the lower face of the frame 78. This structure is only shown in dotted lines to diagrammatically illustrate the principle involved, as this is a conventional means for adjusting a frame on a machine.

'The adjustment of the motor 1"! and correspondingly the drive shaft 15 becomes necessary as forming wheels of different radii are used in the bending of pipes of various diameters. I have provided a scale at the one end of the machine, as shown at 83, to cover the various radii of forming wheels to be used and at the one end of the frame 18, I provide a pointer 84, sothat by setting said pointer at the particular radius representing the radius of the forming wheel to be used, the drive shaft 16 will be properly positioned with respect to the forming wheel which may be applied to use. Of course, when the motor and frame are positioned properly, any conventional form of look may be used to secure the same in the properly adjusted position.

Obviously, forming wheels of different radii are necessary according to the bends that are desired and also according to the size of pipe to be bent. Under certain conditions, it is also apparent that the sliding form will also be changed to correspond with the forming wheel in the bending of pipe of various diameters.

In setting up the machine for operation, the following steps are taken: The proper size mandrel is selected according to the size pipe to bebent and applied to the drive shaft, whereupon said mandrel, driving motor and unit are set to conform to the radius of the forming wheel to be used. This is accomplished by turning the hand wheel 80 which actuates the frame on which the motor is supported and the same is set by the indicator corresponding to the radius indicated on the graduated scale 83.

The proper size forming wheel 22 is then mounted upon the vertical shaft H so that the same engages the four studs 2! and the same is secured by applying the plate 28 and the screw 29 to the end of the shaft. The forming wheel is then checked so as to be in its proper starting position, as for instance, in the position shown in Figures 1 and of the drawings. The selection of the forming wheel 22 is, of course, contingent upon the size of pipe and radius of bend desired. When this is accomplished, the proper sliding form 34 is inserted in the block 35 of the vise-like member and, of course, the guide is properly lubricated so that the sliding form may operate freely.

The pipe to be bent is then selected and the internal walls thereof cleaned and coated with a lubricant of a special character. One form of lubricant usually recommended is composed of one-third white lead, one-third tallow and one-third hypoid gear oil. The spinner mandrel is also coated with this lubricant. Then the pipe to be bent is positioned over the spinner mandrel '15 to the desired location where the bend in the pipe is to start. A preliminary tightening of the vise-like member is accomplished by turning the crank handle 51 in an anti-clockwise direction which moves the block 35 toward the pipe and carries the sliding form 34 inwardly toward the forming wheel 22. Thus, the pipe is firmly clamped between the forming wheel and the sliding form and at the same time the gear segment of the forming wheel and the rack bar of the sliding form are placed in mesh. Then the key plate 60 is inserted in the nearest transverse notches in the vise behind the com pound vise block 46. A wrench is then applied to the screw 52 carried in block 46 to securely retain the sliding form in position.

The next operation involves the application of a plug to the end of the pipe to be bent. This plug, shown in Figure 5 of the dravn'ngs, is designated by the numeral and is provided centrally with an opening 86 through which may be injected within the pipe a lubricant such as heretofore referred to. The introduction of this lubricant may be through the medium of a pressure gun or the like and said lubricant will facilitate the action of the spinner mandrel within the pipe. The plug, obviously, when inserted in the end of the pipe will prevent the splashing or the dripping of the lubricant from said pipe as it is being bent.

The pipe in this position is then adapted to be clamped and secured to the forming wheel. It is positioned between the block 63 of theforming wheel and the clamp 66, the hinged element 61 of the latter being secured in position after the insert 69 has been applied. The screw H is turned home to secure the pipe between the insert 69 and the block 63.

Then the motor H is started to rotate the shaft 76 and the spinner mandrel 15. In Figure 9 of the drawings I have shown starting and stopping buttons for the motor which are connected with the latter in the conventional manner (not shown). The spinner mandrel rotates at approximately 45 revolutions per minute. After the spinner mandrel has been started in operation, the forming wheel is caused to rotate by starting the air motor 4. I have shown in Figure 9 the motor control lever 71a on the front of the machine which is connected to the motor for operation of the latter in a conventional manner, not shown. The proper operation of the level admits air to the air motor thereby transmitting its action through the speed reducer to the bevel gears 6 and 1, thence on to the spur gears 9 and I0 and finally to the vertical shaft ll bearing the forming wheel 22.

As the forming wheel 22 starts its rotation, the sliding form 34 also moves forward through the medium of the coaction between the gear segment 3! on the forming wheel and the rack bar 33 on the sliding form. The forming wheel, turning slowly, also moves the sliding form therewith and the coaction between these two elements tends to overcome the force which would exist on the sliding form, due to the frictional load exerted by the vise, were the gear and rack not used. Furthermore, the roundness of the pipe while bending is preserved through this coaction between the sliding form and the forming wheel.

When the desired bend in the pipe is completed, the machine is stopped by first stopping the air motor and then stopping the motor controlling the spinner mandrel.

To remove the pipe from the spinnermandrel and the machine, the clamping means on the forming wheel is firstdisconnected. This severs all ties between the pipe and the forming wheel. Then the electric motor is started to operate the spinner mandrel. Following this, the forming wheel 22 is started moving by operating the air motor. Since the bending action has ceased through the removal of the clamping means between the pipe and the forming wheel, the latter, in its operation, causes the sliding form to move forwardly. The pipe which is clamped between the forming wheel and the sliding form will, therefore, be drawn forwardly over the spinner mandrel. This action is carried on until the rear end of the sliding form 34 is even with the rear end of the vise block 35, provided the end of the pipe does not extend beyond the rear end of the sliding form. 'If the pipe is shorter than the rear The machine is then stopped, as previously described, the vise block 35 is loosened and the pipe may then be readily removed from the machine.

After the pipe has been removed from the machine, the forming wheel may be brought back to its initial or starting position by reversing the air motor.

The operation of the machine for all sizes of pipes and all radii or bends is the same. Obviously, a change is made in the size of the forming wheel according to the bend desired and correspondingly a change is made in the sliding form according to the size of pipe to be bent.

From the foregoing description, the construction and operation of my improved machine will be readily understood and it will be seen that I have provided a compartively simple, inexpensive and efficient means for carrying out the various objects of the invention. While I have particularly described the elements best adapted to perform the function set forth, it is apparent that various changes in form, proportion and in the minor details of construction, may be resorted to, without departing from the spirit or sacrificing any of the principles of the invention.

What I claim is:

In a pipe bending machine, a forming wheel, the periphery of the latter being concaved to receive a pipe therein, a portion of said periphery being recessed, a block carried in th recess of 'said periphery having the outer face thereof concaved, the upper and lower edges of said block at the outer face thereof being provided with outstanding fianges, a clamping member comprising a body portion and movable and stationary jaws, said jaws having grooves therein to receive the flanges of said block, an insert block carried by said clamping member abutting the outer face of the first mentioned block and having a concaved face to cooperate with the concaved face of the first mentioned block, and an adjusting screw cooperating with the body portion of the clamp and said insert block to secure the elements together and look a pipe end to said forming wheel.

2. In a pipe bending machine, a rotating forming wheel, a sliding form extending at a'tangent to said wheel and adapted to cooperate therewith, a support for said sliding form shiftable radially with respect to said wheel to adjusted positions, a track for said support, manually operated means carried by said track for coarsely adjusting said support and correspondingly said sliding form radially with respect to said wheel, means carried by said track for locking said support'against casual displacement, and additional manually operated means carried by said track for finely adjusting said support radially with respect to said wheel.

3. In a pipe bending machine, a rotatable forming wheel, a sliding form adapted for cooperation therewith, a .base plate, a support for said sliding form shiftable along said base plate radially with respect to said forming wheel, a vice-plate slidably mounted on said base plate outwardly of said support, manually adjusted means carried 'by said vise-plate and engaged with said support for adjusting the position of said support upon said base plate, and manually operated means for adjusting said vise-plate and said support as a unit along said base plate relative to said forming wheel.

4. In a pipe bending machine, a rotatable forming wheel, a sliding form movable at a tangent to the forming wheel and adapted to cooperate therewith, a support for slidably mounting said sliding form, a rack carried by said sliding form, a gear carried by said wheel and meshing with said rack for sliding the slidable form when the wheel is turned, a base plate, said support being slidably mounted on said base plate for radial movement with respect to said Wheel, a vise plate slidably along said base plate, means adjustably connecting said support with said vise plate and adapted to move the support along the base plate relative to said vise plate, means for manually shifting said vise plate along the base plate and correspondingly adjust said support and the sliding form with respect to the rotating wheel, and means shiftable along said base plate to positions for locking said vise plate in its adjusted position with respect to said base plate.

5. In a pipe bending machine, a rotatable forming wheel, a sliding form disposed opposite the periphery of the wheel in position to cooperate therewith, a support slidably carrying said sliding form, a base plate, said support being slidably mounted on said base plate for radial movement with respect to said forming wheel, a vise plate slidably mounted on said base plate, an adjusting screw threaded through said vise plate and swiveled to said support, and a threaded rod rotatably mounted longitudinally of said base plate and threaded through the vise plate for shifting the vise plate and said support along the base plate as a unit when turned.

6.121 a pipe bending machine, a rotatable forming wheel, a sliding form adapted to cooperate therewith, a support for said sliding form, a base plate, said support being slidably mounted on said base plate and movable thereon radially with respect to said forming wheel, a vise plate slidably mounted on said base plate, means adjustably connecting said vise plate with said support to move the latter upon movement of the former on the base plate, said adjustable connecting means being capable of movementto adjust the relationship of the support to said vise plate, means for adjusting said vise plate on said base plate, the aforesaid base plate being notched at longitudinally spaced intervals, and a locking slidably mounted on said base plate and movable radially of said forming wheel towards and away from the wheel, a vise plate slidably mounted on said base plate outwardly of said support, a screw for connecting said support with said vise plate threaded through the vise plate and having its inner end swiveled to said support, said screw when turnedefiecting adjustment of the support with respect to the vise plate, means for adjusting said vise plate along the base plate to correspondingly shift said support and sliding form towards and away from said forming wheel, and means adjustably carried by said base plate for holding said vise plate against movement along the base plate in a direction away from the wheel.

CHARLES E. LAMPE, SR. 

